PNG to WebP Converter — Free Online
Convert PNG (or any image) to WebP format instantly. WebP files are typically 30% smaller than PNG at the same visual quality. Free, browser-based, no upload required.
✓ Free · ✓ No upload · ✓ Works offline in your browser
Higher quality = larger file. 80–90% is a good balance for photos. 100% = lossless.
PNG vs WebP: File Size Comparison
| Format | Transparency | Typical Size | Best For |
|---|---|---|---|
| PNG | Yes | Baseline (100%) | Lossless editing, screenshots |
| WebP (lossy) | Yes | ~65–75% of PNG | Web images, social media |
| WebP (lossless) | Yes | ~85% of PNG | Web logos, UI assets |
| JPG | No | ~40–60% of PNG | Photos, no transparency needed |
Converting PNG to WebP is one of the easiest wins for web performance. WebP uses modern compression algorithms that deliver the same image quality at significantly smaller file sizes — reducing bandwidth costs and improving page load times.
Frequently Asked Questions
Why convert PNG to WebP?
WebP images are typically 25–35% smaller than equivalent PNG files and 25–34% smaller than JPEG at the same quality level. Converting PNG to WebP reduces bandwidth and speeds up web pages while preserving image quality. Google, Facebook, and most major platforms now serve WebP images by default.
How do I convert PNG to WebP for free?
Upload your PNG image using the button above. PhotoRule draws it onto an HTML Canvas element and exports it as WebP using the browser's built-in encoder — entirely in your browser with no server upload required.
Does WebP support transparency like PNG?
Yes. WebP supports transparent backgrounds (alpha channel), making it a drop-in replacement for PNG in most web contexts. This tool preserves transparency when converting PNG to WebP.
Will converting PNG to WebP reduce quality?
At 80–90% quality the visual difference is imperceptible for most images. At 100% quality the conversion is lossless. Use the quality slider to control the tradeoff between file size and image sharpness.
Can all browsers open WebP files?
All modern browsers — Chrome, Firefox, Safari (since macOS 11), Edge, and Opera — fully support WebP. If you need maximum compatibility with older software or Windows Photo Viewer, stick with PNG or JPG.
Is my image uploaded to a server?
No. The entire conversion runs in your browser using the HTML Canvas API. Your image never leaves your device.